Thousands of sets of Children's Pajamas by Apple Park and Klever Kids are being recalled due to failing federal flammability standards.

The Apple Park sets in question involves Apple Park children’s 96% viscose and 4% spandex two-piece sets from the Apple Park Bamboo Loungewear Collection. They were sold in children’s sizes 6 months through size 4. The sets consist of a long-sleeve shirt paired with matching full-length pants with elastic waistband. The collar, ankles and wristbands are solid-colored. The sets come in five animal character prints: pink “bunny,” blue “cubby,” white/green “ducky,” violet “lamby” and green “monkey.” "GPU CO815" is printed on sewn labels at the pants waistline and along the shirt's bottom right side seam.

Customers can contact Apple Park toll-free at (866) 708-4695 from 8:30 a.m. to 5 p.m. ET Monday through Friday, for a full refund.

The Klever Kids sets in question are children’s 100% Pima cotton pajama sets and nightgowns sold in boys and girls sizes 2 through 8. The pajama sets include two-piece long-sleeve shirt and pant sets with an elastic waistband and two-piece short-sleeve shirt and short sets with an elastic waistband. The sets were sold in multiple prints including shark print, ballerinas, black and blue skeletons, flowers, pink with white polka dot pattern, a two-toned set with navy and blue striped monster print, and paisley print with green fabric on the edge. The nightgowns are short-sleeved with a gathered shoulder hem. The nightgowns were sold in multiple prints including ballerinas, pink with white polka dots, flowers and paisleys. All the garments have a printed label at the neck that reads “KleverKids live {Heart} laugh {Heart} love.” Some of the pajamas sets are labeled as “flame resistant sleepwear” by a sewn-in garment label along the shirt's bottom right side seam.

Customers can contact Klever Kids toll-free at (855) 553-8375 from 9 a.m. to 5 p.m. ET Monday through Friday. They can return the product to the store it were purchased from for a full refund.